Case Explained: Summary Calendar Justin Riddle Plaintiff— v. X Corp., formerly known as Twitter, Incorporated Defendant—

Court: United States Court of Appeals for the Fifth Circuit

Filed: 2026-07-13

The Fifth Circuit affirmed the district court’s dismissal of Justin Riddle’s copyright infringement claims against X Corp. The court held that Riddle abandoned his challenge to the initial partial dismissal because he failed to meaningfully brief arguments regarding the Rule 12 order, and further found that the dismissal with prejudice of his remaining contributory-copyright claim was not an abuse of discretion. Under Federal Rule of Civil Procedure 41(b), a dismissal with prejudice is appropriate only when there is a clear record of delay or contumacious conduct and lesser sanctions are insufficient to serve the interests of justice. The district court satisfied this standard by documenting Riddle’s repeated misconduct, including ex parte communications, local-rule violations, and threatening language directed at opposing counsel and the court, despite an express warning that such behavior could lead to dismissal. The appellate court noted that the record supported the district court’s findings that all three aggravating factors were present: delay caused by the plaintiff, actual prejudice to the defendant, and intentional conduct. Consequently, the judgment of the United States District Court for the Western District of Texas is affirmed, and all pending motions are denied.

Do It For The Case Law is a news reporting service. Nothing in this episode constitutes legal advice.